Answer:
The total capacity of the container is 30 gallons in volume.
Explanation:
Assume that the container total capacity is [x] gallons. Then, according to the question -
7x/10 - 6 = x/2
7x/10 - x/2 = 6
x(0.7 - 0.5) = 6
0.2x = 6
x = 6/0.2
x = 6/(1/5)
x = 30 gallons